Dental syringe.



witnesses: a 6

H. P. HAMILTON.

DENTAL SYRINGE.

APPLIOAIION FILED JANA, 1909.

M M g PIIJIORIIS "IIIIS ca. Wsnmarnu. l! c Patented Apr. 27, 1909.

Inveqtor;

HARRY F. HAMILTON, or BOSTON, MASSACHUSETTS.

- DENTAL SYRINGE.

Specification of Letters l 'atent.

Patented April 27, 1909.

Application filed January 4, 1909. Serial No. 470,682.

To all whom it may concern:

Be it known that I, HARRY F. HAMILTON, a citizen of the United States ofAmerica, and a resident of Boston, Commonwealth of Massachusetts, haveinvented certain new and useful Improvements in Dental Syringes, ofwhich the following is a specification.

My invention relates'to a syringe adapted for use by dentists forapplying antiseptic and other medicinal solutions to and around theteeth. r

In treating teeth with antiseptic and other medicinal solutions, I havefound from experience that it is often diflicult with an ordinarysyringe to get the point or nozzle of the syringe into the space orcavity where the liquid is to be deposited. This difiiculty resultslargely from the large size and rigidity of the syringe which does not'ermit of its being turned freely inside of t e mouth to point in anydesired direction.

The obje'ctof my invention is to construct a syringe which is adapted tobe'made of small size so that it may be easily manipulated with thethumband one finger, which shall hold but a very small quantity of liquid andin which the body of the syringe may be easily and cheaply renewed asdesired.

vWith these ends in view, I construct my syrin e of a small section ofrubber tubing usua y not over 1%,- inches in length and inch in outsidediameter with a plu at one end, the other end having inserted t erein aplug terminating in an elongated metal nozzle of small diameter. Theflexibility of the rubber permits the nozzle tobe readily and painless ythrust into cavities and spaces In and around the teethwhere it isdesired to deposit the antise tic or other solution. A syringeconstructe in this manner may be held and manipulated by the thumb andfinger, turned in any desired position inside of the mouth followingeasily small openin s in the tooth where it is important to reac theextreme end of the opening to rinse it out. It may be readily thrustinto the spaces between the gums and teeth and is generally useful inapplying li uids in small quantities for dental and ot er purposes. Thedevice being made up of the rubber tubing and the two plugs, the syringemay be easily and quckly repaired or renewed to formpractically a newsyringe, an important consideration when .medicinal liquids areemployed.

I illustrate my invention by means of the accompanying drawing in whichFigure 1 is a longitudinal section through a syringe constructedaccording to my invention and Fig. 2 is a cross section of the same. 7In the drawing, a represents a metallic nozzle with an elongatedflexible point formed of non-resilient metal which will stay in placewhen bent and a corrugated plug forming its inner end adapted to beinserted into the end of the section b of rubber tubing. Closing therear end of the rubber tube is a plug a corrugated to hold it in placein the tube. By seizing the tube between the thumb and finger, it can besqueezed and the llqfilld drawn in in a limited quantit and ex pe edwhen required. The lengt of the tube may be made greater or lessaccording to the amount of liquid required but .gen-

. erally speaking for dental pur oses only one or two drops are requiredan this quantity being allthat is required, the sha e and size of thesyringe enables it to be free y manipulated inside of the mouth, theliquid to be placed exactly where it is needed.

I claim;

The herein described dental syrin 'e consisting of a section of rubbertubing aving an elongated flexible non-resilient metal nozzle insertedon one end and a plug in the other end held frictionally in position.

In witness whereof I have hereunto set my hand this 26th day of August,1908.

HARRY F. HAMILTON. Witnesses:

S. W. BATES,

E. W. DENNIS.

